FlashBook Template Pack for Crossover - Version 1.0 Crossover series style for flash books don't have a specific theme, some simple and good picture could use in. Also, you could say they are just some random pictures. They looks like random, in fact, we choose them elaborately. These pictures have their own stories, you have yours. Maybe some in those pictures could express your tale, why not choose them to be your book template? So this is about stories. Download and you will understand.